Manufacture of carbohydrate phosphoric-acid esters.



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HANS KARL AUGUST SIMON VON EUIJJR-CHELPIN, OF'STOCKHOLM, SWEDEN, ASSIGN'OB, BY MES'NE ASSIGNMENTS, TO AKTIEBOLAGET ASTRA, AZPOTEKARNAS KEIVIISKA FABRIKER, OF STOCKHO'LM, SWEDEN.

U'EAGTURE OF CARBOHYDRATE PHOSPHORIG-ACID ESTERS.

Be it known that I, HANS KARL AUGUST SIMON VON Eunnn-Cnnnfln, a subject of the King'of Sweden, residing at Stockholm, in the Kingdom of Sweden, have invented certain new and useful Improvements in the Manufacture of Carbohydrate Phosphoric- Acid Esters, of which the following isa specification.

It is known that dephlegmated beer yeast .is able to bind inorganic alkaline phosphates to certain carbohydrates. (Iwanofi 1907 Thereby salts-of carbohydrate phosphoric acid esters are obtained which according to Harden and Young (Proo. Roy. Soc. 81, 528, 1909) are composed according to the formula:

G6H1O4 (PO-1R2) 2 Accolding to Euler and Foder salts f 1 the formula I vCat on are simultaneously formed.

It has been proved that the synthesis of the carbohydrate phosphoric'acid ester is effected by means of a special synthesizing enzym, the phosphatase, which is contained in almost all yeasts, but in very different quantities. If living yeast is brought into the solutions of the said carbohydrate ester salts no fermentation thereof will take place, because said salts'cannot penetrate into the yeast cells, and the phosphatase-- the enzym which acts 'to split carbohydrate phosphoric acid esters-does. not (or only in very small quantities) .leave the living yeast. On the other hand it has been found that living yeast is unsuitable for use in producing carbohydrate phosphoric esters synthetically. In presence of such yeast thesugar disappears by fermentation (formation of alcohol and carbonic acid), and can therefore not be used, for synthesis of phosphoric acid esters. {It has now been found that most races of Saooharom/yces can be used in a living undephlegmated propagable condition, to produce the-said carbohydrate phosphoric acid ester, or the salts thereof, if the fermenting capacity "of the said Saccharomf'qces is weakened'or arrested. Thispreferably is eflected by adding protoplasma-' .poisons or antiseptic means, I as toluene, thympl, chloroform,

Speciflcation of Letters Patent.

Patented Feb. 23,1215.

Application filed May 20, 1913. Serial No. 768,899.

phenol, formaldehyde, sodium fiuorid or the like. Under these circumstances the effect of the synthesizing enzym, the phosphatase, will either not be weakened at all or only in a small degree. The kind of yeast being most available for the purpose is to be ascertained by tests. Generally there is used so much of the poisons that the speed of fermentation is decreased to 3 of the normal amount. yeast, yeast juice or the like a simultaneous fermentation of the sugar is prevented in no or in a very small degree by the addition of toluene.- The addition of toluene in such event does not have the'same advantage as by the present method, because the acthe manner indicated below. Also when salts of calcium are produced, the new salt of calcium but not the salt of magnesiumcalcium is precipitated As startin material each kind of sugafi which is ab e to be fermented by yeast, or each material which containssuch sugar, may be used. It has been found that. starch which by means of malt is transferred into sugar (mash), is especially suitable for the purpose.

EmampZeThe manufacture of the caloz'um salt of the carbohydrate phosphoric acid esteralo 100 gr. cane su ar dissolved in 250 com. water there are adde 150 gr. compressed yeast (containing about 30% dry substance) and 10- com. toluene, After about ten minutes asolution of 7 5 gr. (ii-phosphate of sodium in 300 com. water is added. After By using dry about four hours all free phosphate is passed away. The yeast is withdrawn by filtration and the solution is heated to about 60 C. Should the solution now 'contain free phosphates, the same 1s rendered alkaline by means of ammonla, and so much of a solution of chlorid of magnesium and salammoniac is added, that all free phosphates are precipitated. To the pure filtrate is then added a saturated solution of a salt of calcium in such a quantity that to one part of-phosphoric acid there is used one atom of 7 calcium. Further there is added to one part of volume of this mixture about one part of volume of alcohol of 90% degree. The mixture is then left standing for several hours. The calcium salt of the carbohydrate phosphoric acid ester is then withdrawn by filtration and washed with aqueous alcohol. The

phosphate is thus quantitively transferred into carbohydrate of phosphoric acid ester. The theoretical yield would amount for 75 gr. di-phosphate of sodium to 44 gr. salt ofest'er. The losses from the amount of the theoretical yield depend upon the partial solubility of the salt of calcium. From 75 gr. di-phosphate of sodium 38 gr. salt of ester was really obtained.

Havingnow described my invention, what I claim and desire to protect by Letters Patent is:

1. Method of producing alkaline salts of carbohydrate phosphoric acid esters by drates and living yeast consisting in adding to the yeast toluene, and finally subjecting 'of the carbohydrate phosphoric acid ester consisting in dissolving cane sugar in water and adding compressed yeast andtoluene to the mass, leaving the mass settle, and adding diluted di-phosphate of sodium, withdrawing the yeast by filtration, freeing the solution from albumins by heating, adding a saturated solution of a salt of calcium, adding 90% alcohol to the mass and finally withdrawing the calcium salt of the carbohydrate phosphoric acid ester by filtration and washing the same with diluted alcohol. In testimony whereof I have ailixed my signature in presence of two witnesses.

HANS KARL AUGUST SIMON von EULER-CHELPIN. \Vitnesses:

TH. WAURINSKY, GRETA Piano. 

